RE: XSD Validation with XSLT

This topic leads to the question: is there a Schema validator implemented 100% in XSLT?

--- Michael Kay <mike@xxxxxxxxxxxx> wrote:

> Interesting! XSLT 2.0 takes you some of the way there, but not the whole
> way.
> 
> You can validate an individual employee element in XSLT 2.0 like this:
> 
> <xsl:template match="employee">
>   <xsl:copy-of select="." validation="strict"/>
> </xsl:template>
> 
> but this leaves open the question of what happens if validation fails.
> According to the spec, any validation failure is a fatal error. Saxon has a
> switch (-vw on the command line) to treat validation failures instead as
> warnings. What it does in such cases is to notify the JAXP ErrorListener of
> the failure, and insert a comment into the output file to describe the
> validation error. It wouldn't be too difficult to go one step further and
> call some kind of user hook to attempt a repair - at least in particular
> well-defined cases.
> 
> (This needs the schema-aware version of Saxon, of course)
> 
> Michael Kay
> http://www.saxonica.com/
> 
> > -----Original Message-----
> > From: Robert Soesemann [mailto:rsoesemann@xxxxxxxxxxx] 
> > Sent: 10 December 2004 08:42
> > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> > Subject:  XSD Validation with XSLT
> > 
> > Hello,
> > 
> > I guess my question might seem somewhat strange. The context 
> > is, that I
> > need to bring in content into a CMS that will validate it againts XML
> > Schema files. Some of the XML files that I want to import might not
> > provide data where the datamodel of the CMS might require this. 
> > 
> > My idea was to validate the input against a xsd *by means of XSLT*.
> > This would *not need to validate the whole structure but only test
> > whether elements with unique names have a value or not. I a required
> > field is found to be empty a predefined value should be 
> > inserted. (e.g.
> > a -1 for xs:integer or n/a for xs:string)
> > 
> > To give you an example of my structure:
> > XML:
> > ----
> > <employee>
> > 	<name>Tom</name>
> > 	<id></id>				<-- is required 
> > 	<managedBy>Hans<managedBy>		<-- is required 
> > 	<manages>Frank</manages>		
> > </employee>
> > 
> > XSD:
> > ----
> > <xs:element name="employee">
> > 		<xs:complexType>
> > 			<xs:choice minOccurs="0" maxOccurs="1">
> > 				<xs:element name="name"
> > type="xs:string"/>
> > 				<xs:element name="id" type="xs:string"
> > minOccurs="1"/>
> > ...
> > 
> > 
> > OUTPUT:
> > -------
> > <employee>
> > 	<name>Tom</name>
> > 	<id>n/a</id>				<-- is required 
> > 	<managedBy>Hans<managedBy>		<-- is required 
> > 	<manages>Frank</manages>		
> > </employee>
> > 
> > Any help is very welcome.
> > 
> > Robert
> 
> 


=====
Marian
http://www.utdallas.edu/~mgo031000/


		
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